Author(s): S. F. Alshehri, H. Fouli & S. Ead
The objective of this experimental study was to examine the effect of a
subsidiary pillar, to be located upstream of bridges, on the development of local
scour at a single circular bridge pier.
Experiments were conducted to investigate
the effect of: a) the spacing between the subsidiary pillar and the bridge pier,
b) their relative diameters, and c) the Froude number on the dimensions of the
scour hole and its temporal development.
The experiments were conducted in a
rectangular flume under clear water scour conditions mainly at a Froude number
of 0.2 (preliminary experiments were also conducted at Froude number of 0.1
The results show that the maximum scour depth at the pier could be
minimized using three different combinations of spacing and relative diameters.
A reduction in the maximum scour depth of approximately 50% was possible
compared to the pier-alone case.
local scour, flow altering countermeasures, bridge pier, subsidiary
pier, scour hole development....
Size: 423 kb
Paper DOI: 10.2495/RBM130201
the Full Article
You can purchase the full text version of this article in Adobe PDF format for the above price. Please click the 'Buy Paper' icon below to purchase this paper.
this page to a colleague.